The United Nations Security Council took aim at Islamist militants in Iraq and Syria on Friday, blacklisting six people including the Islamic State spokesman and threatening sanctions against those who finance, recruit or supply weapons to the insurgents.

The 15-member council unanimously adopted a resolution that aims to weaken the Islamic State - an al Qaeda splinter group that has seized swaths of territory in Iraq and Syria and declared a caliphate - and al Qaeda's Syrian wing Nusra Front.